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Hybrid Fiber Compositions and Uses in Containerboard Packaging

a technology of hybrid fibers and compositions, applied in packaging, textiles and paper after-treatment, paper after-treatment, etc., can solve the problems of shortened recycled fibers, increased cost of recycled fibers, and increased weakened and contaminated fibers

Active Publication Date: 2014-04-03
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a packaging material made from non-wood alternative pulp materials that can replace traditional fiber materials. The non-wood alternative pulp materials can make up 5% to 100% of the overall composition. This hybrid fibrous material can be used in existing papermaking, fluting, and case conversion machines for rigid packaging applications. The technical effect is that it provides a more eco-friendly and sustainable packaging solution that can be utilized in existing infrastructure.

Problems solved by technology

However, the OCC frequently requires repulping and de-inking processes.
As such, the recycled fibers get shortened, weakened and contaminated as the number of recycles increase.
Coupled with an increased demand and utilization of recycled fiber by many corrugated cardboard producers, the cost of recycled fiber has also increased.
The move toward single stream recycling is causing an increase in contamination (staples, plastic tapes and hot melt adhesives) of the existing recovered fiber streams.
Critical performance requirements such as strength (compression, edge crush, burst, and tensile strength), stiffness, or rigidity, moisture resistance, grease resistance and freeze / thaw tolerance can be more difficult to achieve with recycled paper or paperboard.
The fines could be viewed as a filler; however, having more fines from wheat straw pulp compared to others doesn't contribute to strength.
Although previous attempts to using alternative fibers to produce construction and furniture applied composite boards, there is a lack of sustainable attempts to produce non-wood natural fiber-based corrugated medium to be used in containerboard packaging applications.

Method used

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  • Hybrid Fiber Compositions and Uses in Containerboard Packaging
  • Hybrid Fiber Compositions and Uses in Containerboard Packaging
  • Hybrid Fiber Compositions and Uses in Containerboard Packaging

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046]A hardwood pulp was made following a typical semi-chemical cook for corrugated medium. The hardwood chips used to make the pulp were standard northern hardwood species mixture, primarily consisting of Birch, Ash and Oak (60 / 30 / 10). Fifteen hundred oven dry grams of the mixed chips were put into a digester—Model M / K 602-2 (M / K Systems, Inc., Peabody, Mass.) with a 10% solution of sodium carbonate (Na2CO3), with a 4:1 liquor to wood ratio. The chips were ramped up to their cooking temperature of 125° C. for 60 minutes, cooked for 30 minutes at temperature and then cooled down. The cooked chips were put through a lab refiner—Model 105-A (Sprout-Waldron, Muncy, Pa.), then screened on a 0.02 cm slotted vibrating flat screen. The fibers were then centrifuged to remove water to make it ready for handsheet making.

example 2

[0047]The mixture of the pulp from Example 1 was used to make handsheets as a control. Ten handsheets were made for each code according to TAPPI T205, where a web-forming apparatus was specified and used. The handsheet basis weight was targeted to be 112 grams per square meter (gsm) with an oven dry weight of 2.24 grams for each handsheet. Actual sample basis weight showed a significant deviation. To minimize effect of basis weight for data comparison, index values are converted based on testing data and shown in Table 1, whereas Example 1 refers a mixture semi-chemical pulp made from Example 1, WS stands for wheat straw pulp, purchased from Shandong Pulp and Paper Co., Ltd. (Jinan, China) and algae refer to red algal fiber, purchased from Pegasus International (Daejeon, Republic of Korea).

example 3

[0048]A mixture of 70% from Example 1 and 30% non-wood alternative natural fibers (20% wheat straw pulp and 10% red algae fiber) was prepared to create handsheets. Other steps to make handsheets and parameters for handdsheets are similar to Example 2, including examples shown below. Therefore, they are not repeated for the sake of brevity.

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Abstract

The present invention relates to a containerboard packaging material comprising at least one non-wood alternative pulp material wherein said non-wood alternative pulp material is present in an amount of from about 5% to about 100% and wherein said material replaces at least a portion of conventional fiber materials.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the use of non-wood alternative natural fibers in corrugated medium for containerboard packaging. A replacement of the conventional hardwood fiber is achieved by a hybrid fibrous composition that provides sufficient mechanical strength for containerboard packaging applications.BACKGROUND OF THE INVENTION[0002]Traditionally pulp derived from fast growing trees, such as pine, has been used as the raw material for containerboard packaging. The containerboard is comprised of linerboard and medium. The linerboard is usually made from softwoods, which have the longest fibers and produce the strongest containerboard. On the other hand, the medium is made from hardwood fibers, which tend to be shorter and stiffer than softwood fibers. In recent years, the use of recycled, old corrugated container (OCC) material has grown in popularity as a linerboard or corrugated medium because of concerns about environmental sustainability. Howe...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21H17/28B32B3/28D21H17/36
CPCB65D65/38D21H11/12D21H13/32D21H17/28D21H17/36D21H27/10Y10T428/24694B65D65/466D21H17/30
Inventor SHI, BOMLEZIVA, MARK M.THOMPSON, BRENT M.ZELENAK, ROBERT J.
Owner KIMBERLY-CLARK WORLDWIDE INC
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